丙酮
静电纺丝
纳米纤维
材料科学
异质结
化学工程
选择性
壳体(结构)
纳米技术
复合材料
化学
光电子学
有机化学
聚合物
催化作用
工程类
作者
Wanjing Wang,Jianbiao Xian,Jin Li,Mengfang Yu,Qiutian Duan,Chung Ming Leung,Min Zeng,Xingsen Gao
标识
DOI:10.1016/j.snb.2023.134724
摘要
In this work, Co3O4/SnO2 heterojunctions were proposed and fabricated by single-nozzle electrospinning. Interestingly, novel yolk-shell nanofibers could be formed in a proper doped content of Co3O4. The gas sensing properties of sensors based on Co3O4/SnO2 yolk-shell nanofibers were evaluated, and a superior response of ∼216–100 ppm acetone at 350 °C was obtained. Additionally, Our sensors have an ultrafast response time of ∼0.62 s, demonstrating remarkable selectivity for acetone and excellent stability for both humidity and long-term use. These exceptional performances are attributed to the synergistic effect of nano-heterojunctions that enhance the effective interfacial area, as well as the unique yolk-shell structure of SnO2/Co3O4, which increases gas transport channels. Our results demonstrate that constructing Co3O4/SnO2 yolk-shell nanofibers is an effective strategy for achieving high-performance acetone gas detection.
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